Synthetic resin and method of producing the same



Patented Sept. 4,]1928.

UNITED STATES PATENT OFFICE.

LINWOOD '1. RICHARDSON, OF NEW BRUNSWICK, NEW JERSEY, ASSIGNOR TO THE QUTLER-EAMMER MFG. (30., OF MILWAUKEE, WISCONSIN, A CORPORATION O]? WIS- CONSIN.

smnnrrc RESIN AND METHOD or PRODUCING THE sum.

No Drawing.

to which well known natural and synthetic resins are now applied.

In the production of this resin the aforementioned organic and inorganic agents are brought into intimate contact as by slowaddition of one to'the other, and maintained in such intimate relation during the ensuing reaction which proceeds automatically in most cases, it being desirable in certain instances to assist or control the reaction as by thermie influence or otherwise.

- As exemplary of the methods which may be adopted for production of "the resin, the following is selected:

Ten parts connnercial furfural and two parts concentrated sulphuric acid are brought together and thoroughly mixed, whereupon reaction takes place spontaneously with production of a gelatinous substance capable of transformation either automatically or otherwise to a state of hardness. The resultant product is characterized by brilliant natural superficial finish and shininessof fracture exposed surfaces indicating density of structure and substantial absence of porosity.

I tions only sulphuric acid, it is to be understood that many other inorganic substances .have been found to be capable of reaction 1922. Serial No. 561.008.

cure by Letters'Patent is:

1. An industrially useful hard resin which is the reaction product of furfural and an inorganic substance of acid reaction or character adapted to produce resinification of the furfural.

2. Anart-icle of manufacture comprising a hard resin which is the reaction product of furfural treated with an inorganic acid material.

3. As an article of manufacture, a hard resin which is the reaction product of fur- .65 fural acidified by sulphuric acid.

4. The process of producing an industrial- 1y useful hard resin from furfural and inorganic substance of acid reaction or character adapted to produce resinification of the 'furfural, which consists in bringing such sub stances into intimate contact and maintaining such contact until resinification takes place.

5. The process of producing an industrially useful hard resin from furfural and sulphuric acid, which consists in bringing. uch compounds into intimate contact and ain taining such contact during continuance of the reaction which ensues.

' 6. An industrially useful hard resin which is the product of reaction. between ten parts of furfural and about two parts of concen- I trated sulphuric acid. While the foregoing specific example men- In witness whereof, I have hereunto subscribed my name. i

L nwoop T. RICHARDSON. 

